For heavens sake - a CT is to ensure the car is roadworthy. So yes, you check your tyre pressures (and of course your spare - why would you think otherwise?) and yes, if your beams sre out of adjustment, you get them adjusted to be considerate to others on the road. You say your wheel bearings are not noisy - so what? Are they correctly adjusted?
As for cleaning, imagine it is you - you say you are a mechanic - who was given the job. Would you prefer to work on a clean or dirty car? Exactly. So be a bit considerate and clean the thing.